US3386629A - Method and apparatus for controlling and metering the flow of granular material - Google Patents

Method and apparatus for controlling and metering the flow of granular material Download PDF

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Publication number
US3386629A
US3386629A US619358A US61935867A US3386629A US 3386629 A US3386629 A US 3386629A US 619358 A US619358 A US 619358A US 61935867 A US61935867 A US 61935867A US 3386629 A US3386629 A US 3386629A
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US
United States
Prior art keywords
pressure
granular material
flow
manifold
line
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
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US619358A
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English (en)
Inventor
Currie Adam
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Wald Indusries Inc
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Wald Indusries Inc
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Filing date
Publication date
Application filed by Wald Indusries Inc filed Critical Wald Indusries Inc
Priority to US619358A priority Critical patent/US3386629A/en
Priority to GB32469/67A priority patent/GB1186234A/en
Priority to ES343842A priority patent/ES343842A1/es
Priority to BE702594D priority patent/BE702594A/xx
Priority to JP42051285A priority patent/JPS521220B1/ja
Application granted granted Critical
Publication of US3386629A publication Critical patent/US3386629A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
    • E01C23/00—Auxiliary devices or arrangements for constructing, repairing, reconditioning, or taking-up road or like surfaces
    • E01C23/16—Devices for marking-out, applying, or forming traffic or like markings on finished paving; Protecting fresh markings
    • E01C23/166—Means for dispensing particulate material on to freshly applied markings or into the marking material after discharge thereof, e.g. reflective beads, grip-improving particles

Definitions

  • ABSTRACT OF THE DISCLOSURE A method and connections to apparatus which control and meter the flow of granular material such as glass beads in road striping machinery, wherein the contents of a tank containing the granular material are under pressure and are caused to flow through a supply line of such dimensions that incremental pressure drops are created in said line between the tank and the receiving manifold, the total pressure drop being such that the pressure in the manifold is at or near zero so as to dampen the pulsations generated by the flow of glass spheres in the system.
  • the present invention relates to road striping machinery and more particularly to means and the method for controlling and metering the flow of glass beads which are added to the paint during the process of placing striping on roadways for the aid of traffic control.
  • the supply container holding the granular material is under pressure from an air supply source such as a compressor.
  • the granular material passes through the supply line to a manifold connected to dispensers which are aligned with paint spraycrs on a road striping truck.
  • a manifold connected to dispensers which are aligned with paint spraycrs on a road striping truck.
  • a 3,386,629 Patented June 4, 1968 regulated supply of air is injected and by this means the flow of the granular material is controlled.
  • the present invention involves the creation of incremental pressure drops in the supply line of flowing glass spheres or other granular material prior to and up to the manifold such that the pressure in the manifold is at or near zero and introducing a super-imposed pressure, from the original source or another source, to the manifold.
  • This superimposed pressure being regulated by a pressure regulator or fluidic device between limits determined by the amount of the supply pressure and the amount of the supply pressure minus the pressure drop thereby changing the pressure head at the nozzles and obtaining a variety of flow rates.
  • a constant super-imposed pressure in the manner described, a constant head at the nozzles is created for a given flow, eliminating the possibility of a fluctuating head.
  • the method of the present invention and apparatus connected in the manner described has advantages over prior art systems and methods in that a smooth flow of granular material such as glass beads or glass spheres may be dispensed from the flow nozzles or dispensing guns of road striping machinery when these flow nozzles or dispensing guns are aligned with the paint spraying guns used in the road striping process.
  • the present method is most economical in the use of the compressed air resources of the road striping equipment and allows wider variation and faster variation of flow than may be accomplished with previous types of road striping equipment used in dispensing of glass beads in the paint of the stripes.
  • FIG. 1 is a partial schematic showing the connections for an embodiment of a system for dispensing glass beads or similar granular mate-rial utilizing the method of the present invention.
  • FIG. 2 is a diagrammatic showing of the manifold means of FIG. 1.
  • FIG. 1 there is shown in a partially schematic view an embodiment of the system for the smooth dispensing of granular material in accordance with the method of the present invention.
  • a tank 11 holds a supply of granular material, which is usually glass spheres or beads, with a lid 12 thereon through which the supply of beads in tank 11 may be replenished.
  • the tank 11 should be airtight in order to maintain the pressure of air from compressor 13 which flows through regulator 14 located in the path between compressor 13 and tank 11.
  • a Y connection 15 from which air is supplied to tank 11 and to the control panel board 20.
  • a regulator valve 21 which may be controlled manually by knob 22 also a pressure gauge 23 which is used to judge the manipulation of the control knob 22.
  • the air flow from Y connection 15 passes through hose connection 16 is regulated by valve 21 and flows through hose 24 to Y connection 25.
  • Y connection 25 the flow of air is separated so as to pass in equal amounts to the left and right carriages of the road striping material, specifically to the sphere manifolds 30 and 30'.
  • FIG. 1 discloses a manual means for operating the regulator valve in the control line to the manifold this regulation could take place by electronic means connected in conjunction with a pressure gauge and with the speedometer indication of the truck carrying the road striping machinery.
  • FIG. 2 illustrates in diagrammatic form the manifold 30 or 30 having inlets such as control line 26 and supply line 28 and outlets 31, 32 and 33 for dispensing hoses which connect to the respective flow nozzles or dispensing guns 34, 35 and 36 as shown in FIG. 1.
  • glass spheres which have been delivered to manifold 30 from tank 11, under pressure, through line 28, the diameter and length of this line being such that the total pressure drop in said line will result in zero or near zero pressure P in the manifold when no injection air is being admitted.
  • the pressure in the manifold is 80% or less of the tank pressure the system meters glass spheres to the stripe line through the fixed orifices or nozzles without pulsations, the amount of flow being a function of the manifold pressure P
  • the amount of injection air required to build up the necessary pressures in the manifold will be a function of the total area of the nozzles or orifices and the primary flow of material.
  • Such a system using a control pressure P is advantageous and can accomplish more than merely varying the pressure P
  • a pressurized closed vessel such as manifold 30 filled with granular material 10 then it is apparent that it is easy to increase the pressure in manifold 30 by variation of pressure P but it is not so easy to decrease the pressure in manifold 30.
  • In order to decrease the pressure therein it would be necessary to blow down the vessel to the pressure desired. This would entail a loss of compressed air and an unwieldy system to operate. With the continued operation of the system as is necessary with road striping equipment and variations in pressure required such loss of compressed air would be great and would be uneconomical and very ineflicient in the continued operation of the system.
  • a system for metering and dispensing granular material without pulsations on a line stripe in conjunction with the painting of said line stripe with road striping machinery comprising container means,
  • pressurized tank supply means to supply granular material to said container means connected thereto, means for creating pressure in said supply means connected thereto,
  • dispensing means for receiving said granular material from said container means connected thereto and dispensing said granular material on said line stripe Without pulsations with the amount of flow through said dispensing means being a function of the pressure in said container means,
  • paint spraying means mounted on road striping machinery in alignment with said dispensing gun in a position forward of said dispensing gun in the direction of movement of said road striping machinery during operation thereof.

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Road Repair (AREA)
  • Nozzles (AREA)
US619358A 1967-02-28 1967-02-28 Method and apparatus for controlling and metering the flow of granular material Expired - Lifetime US3386629A (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
US619358A US3386629A (en) 1967-02-28 1967-02-28 Method and apparatus for controlling and metering the flow of granular material
GB32469/67A GB1186234A (en) 1967-02-28 1967-07-14 Method and Apparatus for Controlling and Metering the Flow of Granular Material in Road Striping Machinery.
ES343842A ES343842A1 (es) 1967-02-28 1967-08-04 Un sistema para distribuir materias granular sobre una rayade marcacion.
BE702594D BE702594A (is") 1967-02-28 1967-08-11
JP42051285A JPS521220B1 (is") 1967-02-28 1967-08-11

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US619358A US3386629A (en) 1967-02-28 1967-02-28 Method and apparatus for controlling and metering the flow of granular material

Publications (1)

Publication Number Publication Date
US3386629A true US3386629A (en) 1968-06-04

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Family Applications (1)

Application Number Title Priority Date Filing Date
US619358A Expired - Lifetime US3386629A (en) 1967-02-28 1967-02-28 Method and apparatus for controlling and metering the flow of granular material

Country Status (5)

Country Link
US (1) US3386629A (is")
JP (1) JPS521220B1 (is")
BE (1) BE702594A (is")
ES (1) ES343842A1 (is")
GB (1) GB1186234A (is")

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3710979A (en) * 1971-04-19 1973-01-16 Degussa Method and apparatus for emptying large packages
US5363989A (en) * 1993-07-09 1994-11-15 Dec International, Inc. Automatic control apparatus for a beverage tap
US6079461A (en) * 1998-08-17 2000-06-27 The Heil Co. Use of inert gas in transfer of comminuted product to tank
US20090208287A1 (en) * 2008-02-14 2009-08-20 Ez Liner Zero velocity bead dispenser

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2833542A (en) * 1952-02-14 1958-05-06 George D Bavin Apparatus for distributing particles along a surface
US2891782A (en) * 1956-02-10 1959-06-23 Air Reduction Concentric-hopper batch-feeder
US3094249A (en) * 1959-04-14 1963-06-18 British Oxygen Co Ltd Powder dispensing apparatus

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2833542A (en) * 1952-02-14 1958-05-06 George D Bavin Apparatus for distributing particles along a surface
US2891782A (en) * 1956-02-10 1959-06-23 Air Reduction Concentric-hopper batch-feeder
US3094249A (en) * 1959-04-14 1963-06-18 British Oxygen Co Ltd Powder dispensing apparatus

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3710979A (en) * 1971-04-19 1973-01-16 Degussa Method and apparatus for emptying large packages
US5363989A (en) * 1993-07-09 1994-11-15 Dec International, Inc. Automatic control apparatus for a beverage tap
US6079461A (en) * 1998-08-17 2000-06-27 The Heil Co. Use of inert gas in transfer of comminuted product to tank
US20090208287A1 (en) * 2008-02-14 2009-08-20 Ez Liner Zero velocity bead dispenser
US8128313B2 (en) 2008-02-14 2012-03-06 Ez Liner Zero velocity bead dispenser

Also Published As

Publication number Publication date
BE702594A (is") 1968-01-15
ES343842A1 (es) 1968-12-01
GB1186234A (en) 1970-04-02
JPS521220B1 (is") 1977-01-13

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